Volvo 1990 780 Model
Faulty ignition system
Check spark plugs, electrode gap should be 0.028" (0.7 mm), and wipe clean.
Check distributor cap for cracks and wipe clean on inside.
Check that all electric leads in the distributor ignition system are clean and correctly connected.
Ice in injection system
Park the vehicle in a warm garage and add fuel line de-icer to the fuel system.
Blocked air filter/fuel filter
Change filter
pg. 78 Service diagnosis (cont.)
Tire imbalance or vibration during
driving
Wheel imbalance
Have the wheels re-balanced.
Incorrect tire pressure
Check and adjust tire pressure.
Level of oil in power-assisted steering pump too low
Check and fill oil, see section "Power steering fluid".
Engine
overheats
Radiator hose cracked or leaking
Check and replace if necessary
Insufficient coolant
file:///K|/ownersdocs/1990/1990_780/90780_16.htm (2 of 4)12/30/2006 8:28:03 AM
